WHEN Lady Gaga appeared on a US talk show in September, she left a smelly surprise in a rubbish bin which the host decided was too good to throw away.

WHAT Lady Gaga would usually flush down a toilet has now been made into an eau de toilette.

Andy Cohen, the host of US cable show Watch What Happens Live, told Jimmy Fallon overnight that his staff decided to turn the singer’s urine into perfume after she appeared on his show back in September.

“So (Lady Gaga) peed in a trash can in her dressing room,” Cohen said.

“It’s a long story, but she did. She said on her way out, ‘Look, I couldn’t get my way to the bathroom, I’m sorry’. She’s a superstar, she’s Lady Gaga, she can pee wherever she wants as far as I’m concerned. And so I said to our PA’s, ‘You guys, we gotta do something with Gaga’s pee. That’s a pop culture artefact. We could bottle that up and put it somewhere in the clubhouse.'”

And that’s exactly what happened.

“I have a PA named Ryan and he emailed me and goes, ‘Look, Gaga’s pee is going to go toxic,'” Cohen told Fallon.

“Not because it’s Gaga’s pee, but just pee goes toxic, apparently. But he found a recipe online where you can make it into something else using alcohol and stuff. He made it into perfume. So, we have it in a pretty bottle. I know, it’s kind of gross, but that is a pop culture artefact, if you ask me. That is going to be worth something.”

So @Andy told me they made perfume out of my pee from the trash in WWH dressing room (long story) U HAVE BEEN WARNED IF HE TRIES TO SPRITZ U

— Lady Gaga (@ladygaga) November 12, 2013